[en] The objective of the Meeting on Seismic Isolation Technology was to provide a forum for review and discussion of seismic isolation technology applicable to thermal and fast reactors. The meeting was conducted consistent with the recommendations of the IAEA Working Group Meeting on Fast Breeder Reactor-Block Antiseismic Design and Verification in October 1987, to augment a coordinated research program with specific recommendations and an assessment of technology in the area of seismic isolation. Seismic isolation has become an attractive means for mitigating the consequences of severe earthquakes. Although the general idea of seismic isolation has been considered since the turn of the century, real practical applications have evolved, at an accelerating pace, over the last fifteen years aided by several key developments: (1) recent advances in hardware developments in the form of reliable elastomer bearings, (2) development of reliable analytical methods for the prediction of dynamic responses of structures (3) construction of large bearing test machines and large shake tables to simulate earthquake effects on structures for validation analytical models and demonstration of performance characteristics, and (4) advances in seismological engineering. Although the applications and developments of seismic isolation technology have mainly benefited commercial facilities and structures, including office buildings, research laboratories, hospitals, museums, bridges, ship loaders, etc., several seismically isolated nuclear facilities were implemented: the four 900 MWe pressurized water reactor units of the Cruas plant in France, the two Framatome units in Koeberg, South Africa, a nuclear waste storage facility in France and a nuclear fuel reprocessing plant in England. The scope of this specialists' meeting was to review the state-of-the-art technology related to the performance of seismic isolator elements and systems, performance limits and margins, criteria for the design, fabrication, testing of seismic isolation elements and systems, the capabilities of analytical codes and models and status of validation. The presentations provided by the participating countries indicated that seismic isolation technology has sufficiently advanced to make it an attractive feature in advanced nuclear power stations for mitigation of severe earthquakes. Indeed, advanced reactor concept evaluation and studies in Canada, Europe, Japan and the USA include horizontal seismic isolation and in some cases a combination of horizontal and vertical seismic isolation. The development of seismic isolation elements/bearings seems to be progressing towards standardized designs. The testing programs indicate high quality and consistency in the bearing manufacturing process. Significant progress has been achieved in providing reliable bonding of elastomer layers and steel laminations that is stronger than the rubber itself. Another important aspect is the demonstrated long term durability of steel-laminated elastomer bearings under sustained loading conditions. The development of design codes and standards for seismic isolation is proceeding independently in the countries applying this technology consistent with the individual frameworks of regulations. In a future meeting it would be of interest to compare key elements of the design codes and standards in particular as they relate to safety aspects